Ask them to check the stock in the back room and ask them to check ALL the boxes they have waiting, even the ones that are marked with a future release date. This has happened to me in the past, most notably when the Nightmare On Elm Street 2 & 3 blu ray was released. I went to three stores looking for the disc - all three of which had it in stock according to their own in store computer systems - and the first two gave up looking and sent me away empty handed. The third one, thankfully, had some employees who actually cared about the fact they couldn't find stock their system said they had. It turns out the discs were packed in a shipment marked with a release date for the following week so nobody there ever bothered to open that box since it was a week out from the marked street date. This was in Massachusetts. I told my brother in Michigan what had happened because he ran into the same problem. He reported back to me later that indeed, in Michigan as well, the exact same issue was the culprit.
